PMAP_IS_MODIFIED(9) | FreeBSD Kernel Developer's Manual | PMAP_IS_MODIFIED(9) |
NAME
pmap_is_modified, pmap_ts_modified — return information about physical pagesSYNOPSIS
#include < sys/param.h>#include < vm/vm.h>
#include < vm/pmap.h>
boolean_t
pmap_is_modified( vm_page_t m);
int
pmap_ts_referenced( vm_page_t m);
DESCRIPTION
The pmap_is_modified() and pmap_ts_referenced() functions return information about physical pages.RETURN VALUES
The pmap_is_modified() function returns the status of the “page modified” bit for the physical page m.The pmap_ts_referenced() function returns a count of reference bits for a page m, clearing those bits. It is not necessary for every reference bit to be cleared, but it is necessary that 0 only be returned when there are no remaining reference bits set on the page.
AUTHORS
This manual page was written by <bms@spc.org>.July 21, 2003 | FreeBSD |